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ARTICULATED HUB FOR HELICOPTER ROTOR

  • US 3,591,310 A
  • Filed: 06/30/1969
  • Issued: 07/06/1971
  • Est. Priority Date: 07/04/1968
  • Status: Expired due to Term
First Claim
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1. A hollow unit-construction mast-hub assembly for pivotally supporting at its top a helicopter rotor, comprising, in combination, a plurality of hollow cylindrical arms having open extremities;

  • sleeves pivotally and slidably mounted on said extremities, each of said sleeves being adapted to support a rotor blade;

    a blade attachment clevis connected to each said sleeve, a flapping and lead-lag hinge device being interposed between each of said sleeves and each of said blade attachment clevises; and

    torsionally flexible tie means being positioned in each of said arms, said tie means being interposed between each of said sleeves and a central corepiece located in said mast-hub so as to be adapted to distribute and balance centrifugal forces developed by the rotor blades.

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